Hello Thanks for writing to us with your health concern. Have you always had regular ? If yes, then the symptoms are due to reasons other than pregnancy. In your case, the standout reason is the I pill. Any kind of hormonal contraceptive pill itself alters the normal menstrual cycle, it can diminish menstrual bleeding to the extent that once in a while, there would be no period. I pill can delay the cycle by upto a week. Stress, anxiety or any kind of emotional upheaval could cause a delayed period. If you are overweight / extremely underweight, or have gained or lost weight rapidly, period could be delayed. Again, thyroid and adrenal hormonal imbalances might be responsible. A condition called poycystic ovaries is characterised in women by delayed and irregular cycles. Any concurrent medication / hormonal preparation you might have taken, could affect your cycles. Thickening of the lining of the uterus or ovarian/ uterine tumours might cause such a delay. Sometimes, it is normal for women to experience some delay / irregularity in the normal cyclicity of the menses. It is called a metropathic cycle and is nothing to worry about, merely an aberration. In your case the standout reason seems to be stress also. If cycles were irregular, a blood B HCG test is better than HPT. All the best Please fee free to discuss further.